Question 349478
First find the slope using the two points.
{{{m=(y[2]-y[1])/(x[2]-x[1])=(1-(-4))/(5-2)=5/3}}}
.
.
.
A parallel line would have an identical slope, {{{highlight(m1=m2=5/3)}}}.
.
.
.
A perpendicular line would have a slope that is a negative reciprocal, {{{m1*m2=-1}}}
{{{(5/3)*m2=-1}}}
{{{highlight(m2=-3/5)}}}